RE: Meat yield
we have never weighed our meat, whether a processor did it, or we butchered it ourselves.
my dad took a deer or two to the one processor a couple years ago. Everyone said this doe was about 140lbs, the processor says "no way, 100-110lbs", when my dad went to get the meat the guy said (of course) that he was right on the money with the weight. The packages of meat were a little small. The guy under weighs all his deer and doesnt give his customers all the meat. This happened to him twice, and i think he ripped off a relative as well.
Needless to say we don't take deer there anymore. we do it in the garage, we control the amount of meat, weigh it ourselves. Never have weighed the butchered meat though.